package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.OrderDetail;
import com.sky.entity.Orders;
import com.sky.mapper.OrderDetilMapper;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.DataStatisticsService;
import com.sky.service.WorkbenchService;
import com.sky.vo.*;
import io.swagger.models.auth.In;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.DataFormat;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * Created with IntelliJ IDEA.
 *
 * @Author: HuoXu
 * @Date: 2023/09/19/17:10
 * @Description: 快乐跳跳虎
 */
@Service
public class DataStatisticsServiceImpl implements DataStatisticsService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private OrderDetilMapper orderDetilMapper;
    @Autowired
    private WorkbenchService workbenchService;


    /**
     * 订单统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO orderStatistics(LocalDate begin, LocalDate end) {
        //存放从begin到end之间的每天对应的日期
        List<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);

        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //存放每天的订单总数
        List<Integer> orderCountList = new ArrayList<>();
        //存放每天的有效订单数
        List<Integer> validOrderCountList = new ArrayList<>();

        //遍历dateList集合，查询每天的有效订单数和订单总数
        for (LocalDate date : dateList) {
            //查询每天的订单总数 select count(id) from orders where order_time > ? and order_time < ?
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);

            //查询每天的有效订单数 select count(id) from orders where order_time > ? and order_time < ? and status = 5
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }
        //计算时间区间内的订单总数量
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        //计算时间区间内的有效订单数量
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        Double orderCompletionRate = 0.0;
        if(totalOrderCount != 0){
            //计算订单完成率
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }
        return  OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 根据条件统计订单数量
     * @param begin
     * @param end
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end, Integer status){
        Map map = new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);

        return orderMapper.countByMap(map);
    }

    /**
     * 获取营业额
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO turnoverStatistics(LocalDate begin, LocalDate end) {
        //存放从begin到end之间的每天对应的日期
        List<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);

        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天的订单总金额
        List<Double> totalAmount = new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //查询当天的营业额
            Double amount = orderMapper.turnoverStatistics(beginTime,endTime,Orders.COMPLETED);
            amount = amount == null ? 0.0 : amount;
            totalAmount.add(amount);
        }

        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(totalAmount,","))
                .build();
    }

    /**
     * 获取总用户和新用户
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO userStatistics(LocalDate begin, LocalDate end) {
        //存放从begin到end之间的每天对应的日期
        List<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);

        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //总的用户数量
        List<Integer> list = new ArrayList<>();
        //新的用户数量
        List<Integer> newUserList = new ArrayList<>();
        for(LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //查询所有用户总数
            Integer totalUser=userMapper.countUser(null,endTime);
            list.add(totalUser);
            //查询新的用户数量
            Integer newUser=userMapper.countUser(beginTime,endTime);
            newUserList.add(newUser);
        }

        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(list,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
    }

    /**
     * 销量前10统计接口
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO topTen(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> goodsSalesDTOList = orderMapper.topTen(beginTime, endTime);
        List<String> nameList = new ArrayList<>();
        List<Integer> numberList = new ArrayList<>();
        for (GoodsSalesDTO goodsSalesDTO : goodsSalesDTOList) {
            String name = goodsSalesDTO.getName();
            Integer number = goodsSalesDTO.getNumber();
            nameList.add(name);
            numberList.add(number);

        }
        return SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(nameList,","))
                .numberList(StringUtils.join(numberList,","))
                .build();
    }

    /**
     * 导出数据
     * @param response
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);
        //查询概览运营数据，提供给Excel模板文件
        BusinessDataVO businessData = workbenchService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));
        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            //基于提供好的模板文件创建一个新的Excel表格对象
            XSSFWorkbook excel = new XSSFWorkbook(inputStream);
            //获得Excel文件中的一个Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");
            // 创建一个样式对象
            CellStyle style = excel.createCellStyle();
            DataFormat format = excel.createDataFormat();
            style.setDataFormat(format.getFormat("0"));
            sheet.getRow(1).getCell(1).setCellValue(dateBegin + "至" + dateEnd);
            //获得第4行
            XSSFRow row = sheet.getRow(3);
            //获取单元格
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessData.getNewUsers());
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getUnitPrice());
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //准备明细数据
                businessData = workbenchService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            //通过输出流将文件下载到客户端浏览器中
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);
            //关闭资源
            out.flush();
            out.close();
            excel.close();

        }catch (IOException e){
            e.printStackTrace();
        }
    }
}
